Two basic kinds of processes must occur in the ecosystems: a cycling of chemical elements and a flow of energy.
Which substance is not recycled but rather is lost from ecosystems?
Which substance is NOT recycled but rather lost from ecosystems? energy. Which structure can perform all the activities required for life?
Which sequence shows the steps of the process of science?
The basic steps of the scientific method are: 1) make an observation that describes a problem, 2) create a hypothesis, 3) test the hypothesis, and 4) draw conclusions and refine the hypothesis.
What is the name given to the functional compartments of a cell?
Membrane-enclosed compartments in eukaryotic cells are called organelles. Organelles, like organs in humans and animals, serve specific functions for the cell. Organelles include structures such as the Golgi apparatus, the mitochondria, and the endoplasmic reticulum.
How can feeding antibiotics to cows promote the evolution of antibiotic resistance quizlet?
How can feeding antibiotics to cows promote the evolution of antibiotic resistance? … Antibiotics exert selective pressure, allowing more resistant bacteria to survive and reproduce than nonresistant bacteria.
Which of the following components is not recycled within an ecosystem?
The energy in an ecosystem is not recycled.
What is the number of species in an ecosystem?
Species richness is the number of different species represented in an ecological community, landscape or region. Species richness is simply a count of species, and it does not take into account the abundances of the species or their relative abundance distributions.
What is the first step in the scientific method?
The first step in the Scientific Method is to make objective observations. These observations are based on specific events that have already happened and can be verified by others as true or false. Step 2. Form a hypothesis.
Which of these is a key feature of the scientific process?
Which of these is a key feature of the scientific method? Scientific hypotheses must be testable.
Why is the scientific method an important process in doing experiments?
It provides an objective, standardized approach to conducting experiments and, in doing so, improves their results. By using a standardized approach in their investigations, scientists can feel confident that they will stick to the facts and limit the influence of personal, preconceived notions.
What are the two major compartments within the cell membrane called?
The nuclear compartment comprising the nucleus. The intercisternal space which comprises the space between the membranes of the endoplasmic reticulum (which is continuous with the nuclear envelope) Organelles (the mitochondrion in all eukaryotes and the plastid in phototrophic eukaryotes)
What are the three main components of a cell?
A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
What does Discovery Science primarily based on quizlet?
Discovery science is based on deductive reasoning, whereas hypothesis-driven science is based on inductive reasoning. Discovery science is mostly about describing nature, whereas hypothesis-driven science tries to explain nature.
How does antibiotic resistance evolve in bacteria?
Antibiotic resistance is a consequence of evolution via natural selection. The antibiotic action is an environmental pressure; those bacteria which have a mutation allowing them to survive will live on to reproduce. They will then pass this trait to their offspring, which will be a fully resistant generation.
How many variables should there be in a well designed experiment how many variables should there be in a well designed experiment?
How many independent variables are there in a well-designed experiment? One, so you can determine a cause and effect relationship between the variable you are changing and the observed response.
Which statement is a scientific theory quizlet?
Terms in this set (6)
A scientific theory is widely accepted explanation that is supported by evidence. Hypotheses and theories are both proposed explanations for a scientific question. “Give examples of different ways in which observations are used in scientific inquiry.”